Brainliest
radio telescopes video—text version
celestial bodies emit different types...
Chemistry, 31.10.2019 19:31, adriandehoyos1p3hpwc
Brainliest
radio telescopes video—text version
celestial bodies emit different types of radiation, only some of which can be detected by traditional telescopes. radio waves are invisible rays that can be detected only by radio telescopes. a radio telescope functions like a television antenna. radio waves from space are sensed by a gigantic parabolic reflector, which concentrates them toward the top of a focusing antenna. a radio receptor converts the radio waves into electrical signals which are amplified and then transmitted to the center of the parabola. they are then recorded and analyzed in the laboratory so that scientists can obtain a radio image of the source observed. the parabolic antenna can usually be oriented to detect radio waves from all directions of space. some radio telescopes are fixed. the largest radio telescope in the world, located in arecibo, puerto rico, is fixed. built in a natural valley shaped like a giant parabola, its reflector measures 305 meters in diameter. mobile detectors suspended from cables permit the scanning of one of part of the sky. unlike traditional telescopes, radio telescopes can be used both day and night, even when there is cloud cover.
questions
describe how radio telescopes are used to explore space.
how are radio waves used on earth?
why do radio telescopes convert radio waves (analog signals) to electrical (digital) signals for analysis? (hint: what did the article say about the advantages of digital signals? )
Answers: 2
Chemistry, 22.06.2019 03:30, ruleolivas
Asample of ammonia reacts with oxygen as shown. 4nh3(g) + 5o2(g) 4no(g) + 6h2o(g) what is the limiting reactant if 4.0 g of nh3 react with 8.0 g of oxygen? o2 because it produces only 0.20 mol of no. nh3 because it produces only 0.20 mol of no. o2 because it produces two times less no than nh3. nh3 because it produces three times more no than o2.
Answers: 3
Chemistry, 22.06.2019 05:30, jameskarbar9p8c9d2
Match the following vocabulary terms to their definitions. 1. amount of energy required to change 1 gram of material from the solid to the liquid state at its melting point 2. a measure of the kinetic energy of the particles of a substance 3. the amount of heat energy required to raise the temperature of 1 gram of liquid water from 14.5°c to 15.5°c 4. amount of energy required to change 1 gram of material from the liquid to the gaseous state at its boiling point 5. the amount of energy required to change 1 gram of a substance 1°c a. temperature b. latent heat of vaporization c. latent heat of fusion d. calorie e. specific heat
Answers: 1
Chemistry, 22.06.2019 06:00, girly37
In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?
Answers: 3
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